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<p>How old is the battery? If you got more than 5 years out of it
you got your money's worth (I've noticed battery quality has
largely gone down since most are now Hecho En Mexico, even 'name'
brands; Deka, for one, is still made in the 'States and is
excellent quality).</p>
<p>The unloaded voltage doesn't mean much; an almost dead battery
can still measure > 12V. You need a load tester to tell for
sure if the battery is still good; HF has a cheap one, but only
pulls 100amps so is probably a waste of money, I have one similar
to this (but the cables get very hot very quickly):</p>
<p><b><a class="moz-txt-link-freetext" href="https://tinyurl.com/y3l68nfd">https://tinyurl.com/y3l68nfd</a></b></p>
<p>There are (much) more expensive ones available for 'professional'
use that have fans for cooling and are probably best. Maybe you
can rent one or get AutoZone or some other parts house to test for
you?</p>
<p>AFAIK there is no way to add water to sealed 'maintenance-free'
batteries (and if you did, it likely wouldn't remain 'sealed' any
longer).</p>
<p>Bob</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 7/21/2019 3:18 PM, Lee Daniels via
Shop-talk wrote:<br>
</div>
<blockquote type="cite"
cite="mid:8704ae3ea3ff1a24efd551c1e13fb73a.squirrel@automate-it.com">
<pre class="moz-quote-pre" wrap="">I suspect this has come up before, but my quick archive search didn't turn up
anything.
The DieHard in my TR6 is several years old, but it sits on a Battery MINDer
most of the time. Lately when I start the car, I first get one short "Rrr"
like a dead battery. But keep trying and it turns over *very* reluctantly for
a few revs, then (so far) builds speed, and eventually starts. After a drive,
it starts normally.
It's now sat for a day, so I figured I'd check the water level - but, uh-oh,
can't figure out a way to get the cover off without tearing up the battery.
See attached photo. I can pry on the two ends and get them to barely move, but
the edges of the cover don't budge with gentle prying.
Out of the car, I measure >12.8V, and it's never had any corrosion etc. Is
there anything I can do with this thing?
Thanks
Lee</pre>
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